The fields produced by a long beam with a given transverse charge distribution in a homogeneous vacuum chamber are studied. Signals induced by the displaced finitesize beam on electrodes of a beam position monitor (BPM) are calculated and compared to those from a pencil beam. The non-linearities and corrections to BPM signals due to a finite transverse beam size are calculated for an arbitrary ...

A simple method to fabricate circular microchannels in polydimethylsiloxane (PDMS) is presented and used for facil single cell trapping at low vacuums. A coating of liquid PDMS is applied on the walls of square microchannels, to give them a circular cross section. Diameters ranging from few micrometers to few hundreds of micrometers were achieved. Different coating conditions were systematicall...

During the operation of hydrocyclone cut size diameter is most important data. This connected to feed rate, which closely related cross section. Preliminary research has revealed that square cross-section more effective than circular cross-section. The compared 2 types sections at 5 different rates. One a standard rectangular and other narrows with baffle plate. calculations for have shown bett...